1. Look closely at the surface of the tempered glass. In order to increase the production speed, small manufacturers often do not care about the silica gel that is inadvertently dropped on the surface of the tempered glass. If it is not removed, the power generation efficiency of the panel will be reduced.
2, look at the battery
Many irregular manufacturers use broken battery pieces to form a seemingly complete battery piece for welding. This method is very risky, and may not be obvious at the beginning, but the spliced battery piece is easy to be disconnected again later, affecting the whole piece. The use of solar panels.
3, look at the back
Look at the quality of the back pressure, there is no unevenness after the pressure, such as bubbles, wrinkles and the like.
4, look at the border
Due to the low barriers to entry in the solar panel industry, many small manufacturers use manual frame-stitching methods. Because of the unevenness of the frame every time, the frame is not tightly touched, and the shape is not strictly rectangular. The degree is also greatly reduced.
5, see silicone
Look at whether the silicone around the back is evenly distributed, and whether it penetrates tightly into the gap between the backboard and the frame.
6, look at welding
Carefully observe the strand welding of the battery sheet for leakage welding. At the same time, it is necessary to see if the arrangement of the cells is regular.
7, look at the junction box
Finally, see if the junction box is firm, and whether the junction box cover can be firmly and tightly attached to the junction box; see if the wire lock is free to rotate and can be tightened.
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